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Individual
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Individual
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Priority to ES32718ApriorityCriticalpatent/ES32718A1/en
Publication of ES32718A1publicationCriticalpatent/ES32718A1/en
ES32718A1903-10-201903-10-20
An industrial procedure consisting of an artificial charcoal entitled "Carbón de París, Martínez Sancho system".
ExpiredES32718A1
(en)